Cindy Qiu, an associated producer with San Francisco television station KGO, was on the flight and said that just after the plane door was closed Armstrong was approached by a flight attendant and asked to pull his pants up.

"Don't you have better things to do then worry about that?" Qiu said Armstrong replied.

The request was repeated and eventually Armstrong and company were removed from the airplane.

Southwest responded to Armstrong's tweet by tweeting, "Very sorry for your experience tonight, someone from our Customer Relations Team will reach out to you to get more details."

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In a statement later released to the media Southwest said:

"As soon as we became aware of what had happened, we reached out to apologize for this Customer’s experience. He elected to take the next flight. We followed up with this Customer and involved Employees to get more details and, in our latest conversations, understand from the Customer the situation was resolved to his satisfaction."